kinetics, a reaction rate constant or reaction rate coefficient (⁠ k {\displaystyle k} ⁠) is a proportionality constant which quantifies the rate and direction...

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration...

expression for the reaction rate of a given reaction in terms of concentrations of chemical species and constant parameters (normally rate coefficients and...

describes a linear free-energy relationship relating reaction rates and equilibrium constants for many reactions involving benzoic acid derivatives with meta-...

qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation...

chemical kinetics, an Arrhenius plot displays the logarithm of a reaction rate constant, ( ln ⁡ ( k ) {\displaystyle \ln(k)} , ordinate axis) plotted against...

of reaction rates from which rate laws and rate constants are derived. Relatively simple rate laws exist for zero order reactions (for which reaction rates...

of a reaction rate constant or equilibrium constant for one series of chemical reactions with the logarithm of the rate or equilibrium constant for a...

overall rate of a reaction is often approximately determined by the slowest step, known as the rate-determining step (RDS or RD-step or r/d step) or rate-limiting...

for a zero order reaction depends on the initial concentration and the rate constant. In first order reactions, the rate of reaction will be proportional...

Arrhenius equation describes the exponential dependence of the rate constant of a chemical reaction on the absolute temperature as k = A e − E a R T , {\displaystyle...

The equilibrium constant of a chemical reaction is the value of its reaction quotient at chemical equilibrium, a state approached by a dynamic chemical...

pseudo first order reaction rate constant (in water at 25 °C), k, of a reaction, normalized to the reaction rate, k0, of a standard reaction with water as...

spontaneous reaction if the system is closed and initial and final temperatures are the same. For processes that take place in a closed system at constant pressure...

chemical engineering to relate the chemical reaction timescale (reaction rate) to the transport phenomena rate occurring in a system. It is named after German...

that are typically obtained from the temperature dependence of a reaction rate constant, when these data are analyzed using the Eyring equation of the transition...

stable) co-reagent species, the reaction rate constant at the low temperature of the CRESU flow can be determined. Reactions studied by the CRESU technique...

inverse recombination reaction H3O+ + OH− → 2 H2O is among the fastest chemical reactions known, with a reaction rate constant of 1.3×1011 M−1 s−1 at...

stage is characterized by the forward reaction rate constant k2 = 0.072 sec-1. The dissociation constant is determined as the ratio k-1/k1 = 13.76...

the dissociation constant can also be called an ionization constant. For a general reaction: A x B y ↽ − − ⇀ x A + y B {\displaystyle {\ce {A_{\mathit...

chemistry, the law of mass action is the proposition that the rate of a chemical reaction is directly proportional to the product of the activities or...

time, and ⁠ k r {\displaystyle k_{r}} ⁠ is the reaction rate constant. As can be deduced from the rate law equation, the number of A molecules that decay...

}}{h}}+{\frac {\Delta S^{\ddagger }}{R}}} where: k {\displaystyle k} = reaction rate constant T {\displaystyle T} = absolute temperature Δ H ‡ {\displaystyle...

{dX}{dt}}=-\kappa X} where X is the reactant (kerogen) and κ is the reaction rate constant which introduces the temperature-dependence via the Arrhenius equation...

involved in the rate-determining step. What distinguishes SN2 from the other major type of nucleophilic substitution, the SN1 reaction, is that the displacement...

Enzyme kinetics is the study of the rates of enzyme-catalysed chemical reactions. In enzyme kinetics, the reaction rate is measured and the effects of varying...

the reaction rate of a chemical reaction when one of the atoms in the reactants is replaced by one of its isotopes. Formally, it is the ratio of rate constants...

{\displaystyle r=n_{A}\,n_{B}\,k} where k is the reaction rate constant of each single elementary binary reaction composing the nuclear fusion process: k = ⟨...

(linear) reactions the product of the reaction rate constants in the clockwise direction is equal to the product of the reaction rate constants in the counterclockwise...

at both temperatures. This is due to the reaction rate constants for these reactions having β and γ constants of 0, resulting in k = α which is independent...